Sadly it's just 16:9. Not even 16:10.

I now run 2 3:2 Displays (BenQ RD280U) at home (more in the office, but I never go there) and love my vertical real estate. (No, portrait mode won't work out)

Thank you for this suggestion!

For Laptops 16:10 (and with the framework and surface even 15:10/3:2) is already quite common, while in the desktop market 16:9 and these ultrawides are dominant.

With 16:9 the whitespace on websites even with Tabs on the side is simply to high ;)